added demo 7 pong to the repo

Examples/Arduboy-Tutorials/demo7/src/lib.rs

@@ -0,0 +1,232 @@
+#![no_std]
+#![allow(non_upper_case_globals)]
+
+use arduboy_rust::prelude::*;
+const arduboy: Arduboy2 = Arduboy2::new();
+
+#[derive(Debug, Copy, Clone, Hash, Eq, PartialEq, Ord, PartialOrd)]
+enum GameState {
+    Title,
+    Gameplay,
+    Win,
+    Lose,
+}
+
+struct Ball {
+    x: i16,
+    y: i16,
+    size: u8,
+    right: bool,
+    down: bool,
+}
+
+impl Ball {
+    unsafe fn draw(&self) {
+        arduboy.fill_rect(self.x.into(), self.y.into(), self.size, self.size, Color::White);
+    }
+}
+
+struct Paddle {
+    x: i16,
+    y: i16,
+    width: u8,
+    height: u8,
+}
+
+impl Paddle {
+    unsafe fn draw(&self) {
+        arduboy.fill_rect(self.x.into(), self.y.into(), self.width, self.height, Color::White);
+    }
+}
+
+static mut G: Globals = Globals {
+    game_state: GameState::Title,
+    player_score: 0,
+    ai_score: 0,
+    ball: Ball {
+        x: 62,
+        y: 1,
+        size: 4,
+        right: true,
+        down: true,
+    },
+    player: Paddle {
+        x: 0,
+        y: 50,
+        width: 2,
+        height: 12,
+    },
+    ai: Paddle {
+        x: (WIDTH - 4) as i16,
+        y: 50,
+        width: 2,
+        height: 12,
+    },
+};
+
+struct Globals {
+    game_state: GameState,
+    player_score: u8,
+    ai_score: u8,
+    ball: Ball,
+    player: Paddle,
+    ai: Paddle,
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn setup() {
+    arduboy.begin();
+    arduboy.init_random_seed();
+    arduboy.set_frame_rate(60);
+}
+
+#[no_mangle]
+#[export_name = "loop"]
+pub unsafe extern "C" fn loop_() {
+    if !arduboy.next_frame() {
+        return;
+    }
+
+    arduboy.poll_buttons();
+
+    arduboy.clear();
+    match G.game_state {
+        GameState::Title => {
+            arduboy.set_cursor(52, 10);
+            arduboy.print(f!(b"PONG\0"));
+            arduboy.set_cursor(16, 22);
+            arduboy.print(f!(b"Press A to start\0"));
+            if A.just_pressed() {
+                G.game_state = GameState::Gameplay;
+            }
+        }
+        GameState::Gameplay => {
+            gameplay();
+            if A.just_pressed() {
+                reset_game();
+            }
+        }
+        GameState::Win => {
+            arduboy.set_cursor(40, 10);
+            arduboy.print(f!(b"You Win!\0"));
+            if A.just_pressed() {
+                reset_game();
+            }
+        }
+        GameState::Lose => {
+            arduboy.set_cursor(37, 10);
+            arduboy.print(f!(b"Game Over\0"));
+            if A.just_pressed() {
+                reset_game();
+            }
+        }
+    }
+
+    arduboy.display();
+}
+
+unsafe fn reset_game() {
+    G.game_state = GameState::Title;
+    G.ball.x = (WIDTH / 2) as i16;
+    G.player_score = 0;
+    G.ai_score = 0;
+}
+
+unsafe fn gameplay() {
+    //
+    // Player movement
+    //
+
+    if UP.pressed() && G.player.y > 0 {
+        G.player.y -= 1;
+    }
+
+    if DOWN.pressed() && G.player.y + (G.player.height as i16) < (HEIGHT - 1) as i16 {
+        G.player.y += 1;
+    }
+
+    //
+    // AI movement
+    //
+
+    if G.ball.x > 115 || random_between(0, 20) == 0 {
+        if G.ball.y < G.ai.y {
+            G.ai.y -= 1;
+        } else if G.ball.y + (G.ball.size as i16) > G.ai.y + G.ai.height as i16 {
+            G.ai.y += 1;
+        }
+    }
+
+    //
+    // Ball movement
+    //
+
+    if G.ball.y == 1 {
+        G.ball.down = true;
+    } else if G.ball.y + G.ball.size as i16 == (HEIGHT - 1) as i16 {
+        G.ball.down = false;
+    }
+
+    if G.ball.x == G.player.x + G.player.width as i16
+        && G.ball.y + G.ball.size as i16 > G.player.y
+        && G.ball.y < G.player.y + G.player.height as i16
+    {
+        G.ball.right = true;
+    }
+
+    if G.ball.x + G.ball.size as i16 == G.ai.x
+        && G.ball.y + G.ball.size as i16 > G.ai.y
+        && G.ball.y < G.ai.y + G.ai.height as i16
+    {
+        G.ball.right = false;
+    }
+
+    if G.ball.right {
+        G.ball.x += 1;
+    } else {
+        G.ball.x -= 1;
+    }
+
+    if G.ball.down {
+        G.ball.y += 1;
+    } else {
+        G.ball.y -= 1;
+    }
+
+    //
+    //
+
+    // Scoring
+    if G.ball.x + G.ball.size as i16 == -10 {
+        G.ai_score += 1;
+        G.ball.x = (WIDTH / 2) as i16;
+        G.ball.right = true;
+    } else if G.ball.x == (WIDTH + 10) as i16 {
+        G.player_score += 1;
+        G.ball.x = (WIDTH / 2) as i16;
+        G.ball.right = false;
+    }
+
+    if G.player_score == 5 {
+        G.game_state = GameState::Win;
+    } else if G.ai_score == 5 {
+        G.game_state = GameState::Lose;
+    }
+
+    //
+    // Drawing
+    //
+
+    arduboy.set_cursor(20, 2);
+    arduboy.print(G.player_score as u16);
+
+    arduboy.set_cursor(101, 2);
+    arduboy.print(G.ai_score as u16);
+
+    arduboy.draw_fast_hline(0, 0, WIDTH, Color::White);
+    arduboy.draw_fast_hline(0, (HEIGHT - 1) as i16, WIDTH, Color::White);
+
+    G.player.draw();
+    G.ai.draw();
+    G.ball.draw();
+}